December weather forecast
Sertanópolis, Brazil

The first month of the summer, December, is still a warm month in Sertanópolis, Brazil, with an average temperature fluctuating between 19.5°C (67.1°F) and 29.4°C (84.9°F).

Temperature

With the start of December, Sertanópolis measures an average high-temperature of a still moderately hot 29.4°C (84.9°F), not significantly differing from November's warm 29.4°C (84.9°F). During December, the average low-temperature in Sertanópolis is an enjoyable 19.5°C (67.1°F).

Heat index

The heat index value for December is appraised at a fiery hot 36°C (96.8°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Sertanópolis, the average relative humidity in December is 80%.

Rainfall

In December, the rain falls for 23.4 days. Throughout December, 111mm (4.37") of precipitation is accumulated. Throughout the year, in Sertanópolis, there are 186.6 rainfall days, and 1019mm (40.12") of precipitation is accumulated.

Daylight

December has the longest days of the year in Sertanópolis, with an average of 13h and 30min of daylight.
On the first day of the month, sunrise is at 05:29 and sunset at 18:56. On the last day of December, in Sertanópolis, sunrise is at 05:41 and sunset at 19:13 -03.

Sunshine

In Sertanópolis, Brazil, the average sunshine in December is 7.9h.

UV index

The months with the lowest UV index in Sertanópolis are February, April through July and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 5 in December translates into this advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.